JP2015195173A - vehicle marker lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle marker lamp which is installed in a cabin along a rear window, and does not impair the visibility of a vehicle rear part from a driver's seat.SOLUTION: A marker lamp is constituted of an organic EL light emitting body 10 in which organic light emitting layers 14 are laminated between a pair of opposing electrode layers 12a and 12b, and installed in a cabin along a rear window 2 of an automobile. The organic light emitting layers 14 and the front face side electrode layer 12b are made transparent, and the back face side electrode layer 12b is constituted of a reflection layer of a stripe pattern having a metallic glossy face. A vehicle rear part is transparent from a non-formation region of the back face side electrode layer 12a (stripe pattern) of the light emitting body 10 which constitutes the marker lamp, and a field of view of the vehicle rear part through the marker lamp becomes slightly dark, however, the field of view of the vehicle rear part is not blocked by the marker lamp. At the lighting of the marker lamp, light is not emitted to the cabin side, and the light does not become glare light through a back mirror, and does not cause misidentified information to an oncoming vehicle and a pedestrian even if the light is distributed to a vehicle front part from the inside of the cabin.

Description

  The present invention relates to a vehicular marker lamp such as a stop lamp, and more particularly to a vehicular marker lamp provided at the rear of a vehicle.

  Vehicle sign lights such as stop lamps and turn signal lamps are provided on the rear side of the vehicle in pairs, but in the recent automobile industry, the rear window tends to be enlarged in order to ensure sufficient rear view. Therefore, there is a problem that the space for installing the marker lamp is reduced.

  Although it may be arranged inside the rear window like a high-mount stop lamp, there is a problem that the visibility behind the vehicle is reduced because the view behind the vehicle is blocked by the lamp.

  Therefore, in Patent Document 1 described below, the high-mount stop lamp disposed inside the rear window is configured by a plate-shaped organic EL light-emitting panel, thereby improving the reduction in rear visibility from the driver's seat.

  That is, the organic EL light-emitting panel emits red light when it is lit, but is transparent when not lit, so that the rear visibility from the driver's seat is not blocked by the high-mount stop lamp.

JP-A-11-198720

  However, in Patent Document 1 described above, for example, while the brake lamp is stepped on, the organic EL light emitting panel emits light on both the front and back surfaces, that is, the vehicle interior side. There is a new problem that glare light is emitted and the rear visibility from the driver's seat is rather deteriorated.

  Another problem is that the red light emitted from the organic EL light-emitting panel is distributed from the passenger compartment to the front of the vehicle, causing the oncoming vehicle to erroneously recognize the traveling direction of the host vehicle.

  The present invention has been made in view of the above-described problems of the prior art, and the object thereof is composed of an organic EL light emitter, and is disposed in a passenger compartment along the rear window of an automobile. In order to provide a vehicular beacon that does not impair visibility behind the vehicle, and that does not generate glare light for the driver and misleading light for the oncoming vehicle or pedestrian to recognize the traveling direction of the vehicle. is there.

In order to achieve the above object, in the vehicular marker lamp according to claim 1,
In a vehicle marker lamp, which is composed of a plate-shaped organic EL light emitter in which an organic light emitting layer is laminated between a pair of opposing electrode layers, and is disposed in a passenger compartment along a rear window of an automobile,
The organic light-emitting layer and the front-side electrode layer of the light-emitting body are each configured to be transparent, and the back-side electrode layer of the light-emitting body is a stripe-patterned reflective layer that forms a metallic glossy surface at the boundary with the organic light-emitting layer. Configured.
(Operation) When the switch of the marker lamp is turned on and a DC voltage is applied between the electrode layers of the organic EL light emitter, the organic light emitting layer emits light in a predetermined color (for example, red for a stop lamp), and organic The red light emitted from the side facing the rear window of the EL light emitter passes through the rear window and is distributed to the rear of the vehicle to function as a marker lamp.

  Specifically, a portion of the organic light emitting layer corresponding to the back electrode layer in the stripe pattern in the organic light emitting layer emits light, and is emitted from the side facing the rear window of the organic EL light emitting device. The light reflected by the metallic glossy surface formed in the boundary with the organic light emitting layer of the side electrode layer is also included. That is, the light originally emitted from the passenger compartment side is also reflected by the metallic gloss surface of the back electrode layer and emitted from the side facing the rear window. For this reason, the side facing the rear window of the organic EL light emitter emits bright light in a stripe pattern, and the visibility of the marker lamp is improved.

  On the other hand, since the light emission of the organic light emitting layer is shielded by the striped back electrode layer on the side of the cabin of the organic EL light emitter, and the portion of the organic light emitting layer where the back electrode layer is not formed originally does not emit light. The light emission of the organic light emitting layer can hardly be emitted from the cabin side of the organic EL light emitter.

  As a result, the light emitted from the vehicle interior side of the marker lamp is extremely weak so that it can be ignored. The light emitted from the vehicle interior side of the marker lamp is guided to the driver via the rearview mirror and becomes glare light. The light emitted from the sign lamp to the passenger compartment is distributed from the passenger compartment to the front of the vehicle, and does not act as misidentification information for oncoming vehicles or pedestrians.

  In addition, there is a marker lamp in the field of view behind the vehicle that can be seen through the rear window from the driver's seat, but the area where the back-side electrode layer (striped pattern) of the organic EL light emitter constituting the marker lamp is not formed is transparent Therefore, the field of view behind the vehicle seen through the marker lamp will be dark but will not be blocked. This is the same whether the marker lamp is on or off.

In order to achieve the above object, in the vehicular marker lamp according to claim 2,
In a vehicular marker lamp, which is composed of a plate-shaped organic EL light emitting body in which an organic light emitting layer is laminated between a pair of opposing electrode layers, and is disposed in a vehicle compartment along a rear window of an automobile,
The front side electrode layer and the back side electrode layer of the luminous body are each configured to be transparent, and the organic light emitting layer is configured with a transparent organic polarized light emitting layer that emits linearly polarized light vertically or horizontally,
A polarizing plate that blocks polarized light emitted from the light emitter toward the passenger compartment is disposed on the passenger compartment side near the light emitter.
(Operation) The organic polarized light emitting layer is configured such that polarized light in the vertical direction or the horizontal direction is emitted when the directions of the molecular chains constituting the organic light emitting layer are regularly aligned in one direction.

  When the marker lamp is turned on and a DC voltage is applied between the electrodes of the organic EL light emitter, the organic polarized light emitting layer emits light in a predetermined color (for example, red in a stop lamp) (vertical or The red polarized light emitted from the side facing the rear window of the organic EL light emitter is transmitted through the rear window and distributed to the rear of the vehicle, and functions as a marker lamp.

  On the other hand, polarized light emitted from the cabin side of the organic EL light emitter is shielded by a polarizing plate disposed in the vicinity of the light emitter. Specifically, when the organic light-emitting layer emits light in the vertical direction, the light is reliably blocked by a horizontal polarizing plate (a polarizing plate that blocks vertical polarized light and transmits horizontal polarized light). The Further, when the light emitted from the organic polarized light emitting layer is horizontally polarized light, the light is reliably shielded by a vertical polarizing plate (a polarizing plate that shields horizontally polarized light and transmits vertically polarized light). .

  As described above, the polarized light emission on the vehicle interior side of the organic EL light emitter is surely shielded by the polarizing plate, so that the light emitted from the marker lamp can be guided to the driver via the rearview mirror. There is no light distribution.

  In addition, there is a marker lamp in the field of view behind the vehicle that can be seen through the rear window from the driver's seat, and the organic EL light emitter itself is transparent and can be seen through (transmits both vertically polarized light and horizontally polarized light. However, the polarizing plate can transmit only one of the horizontally polarized light and the vertically polarized light. For this reason, the field of view behind the vehicle that can be seen through the marker lamp is not blocked by the marker lamp, although it becomes darker because the polarizing plate has a lower visible light transmittance. This is the same whether the marker lamp is on or off.

In Claim 3, in the vehicle marker lamp according to Claim 1,
The organic light emitting layer was composed of a transparent organic polarized light emitting layer that emits linearly polarized light vertically or horizontally.

  (Function) Since the organic light emitting layer is composed of a transparent organic polarized light emitting layer that emits polarized light in the vertical or horizontal direction as in claim 2, when a DC voltage is applied between the electrode layers, the organic light emitting layer The organic polarized light emitting layer emits polarized light in the vertical or horizontal direction.

  In particular, since the back electrode layer is composed of a reflective layer having a stripe pattern as in the first aspect, only the portion corresponding to the back electrode layer having the stripe pattern in the organic polarized light emitting layer is polarized light emission (back electrode). In other words, the non-layer-forming region does not emit light), that is, the side facing the rear window of the organic EL luminous body emits polarized light in a stripe pattern, passes through the rear window, is distributed to the rear of the vehicle, and functions as a marker lamp.

  Further, among the light emitted from the organic polarized light emitting layer, the light originally emitted from the passenger compartment side is also reflected by the metallic gloss surface of the back electrode layer and emitted from the side facing the rear window of the organic EL light emitter, The light distribution at the rear of the marker lamp increases, and the visibility is improved.

  On the other hand, on the vehicle interior side of the organic EL light-emitting body, the polarized light emission of the organic polarized light-emitting layer is shielded by the stripe-patterned back-side electrode layer, and the back-side electrode layer non-formation region in the organic polarized light-emitting layer originally does not emit light. The polarized light emitted from the organic polarized light emitting layer can hardly be emitted from the cabin side of the organic EL light emitting body.

  As a result, the light emitted from the passenger compartment side of the marker lamp is extremely weakly polarized light that is almost negligible, and the light emitted to the passenger compartment side of the marker lamp is led to the driver via the rearview mirror, resulting in glare light, Also, the light emitted from the marker lamp toward the passenger compartment is distributed from the passenger compartment to the front of the vehicle and does not act as misidentification information for oncoming vehicles or pedestrians.

  In addition, there is a marker lamp in the field of view behind the vehicle that can be seen through the rear window from the driver's seat, but the area where the back-side electrode layer (striped pattern) of the organic EL light emitter constituting the marker lamp is not formed is transparent Therefore, the field of view behind the vehicle seen through the marker lamp will be dark but will not be blocked. This is the same whether the marker lamp is on or off.

In order to achieve the above object, in the vehicle marker lamp according to claim 4,
In a vehicle marker lamp, which is composed of a plate-shaped organic EL light emitter in which an organic light emitting layer is laminated between a pair of opposing electrode layers, and is disposed in a passenger compartment along a rear window of an automobile,
Each of the pair of electrode layers and the organic light emitting layer has translucency, and the back-side electrode layer is composed of a light reflection / transmission layer that reflects part of incident light and transmits part of it.

The light reflecting / transmitting layer constituting the back electrode layer is composed of, for example, a half mirror in which an aluminum thin film is formed by vapor deposition or the like. The half mirror has a characteristic of reflecting a part of incident light and transmitting a part thereof, and its light transmittance (light reflectance) can be adjusted by changing the film thickness.
(Operation) When the switch of the marker lamp is turned on and a DC voltage is applied between the electrode layers of the organic EL light emitter, the organic light emitting layer emits light in a predetermined color (for example, red for a stop lamp), and organic The red light emitted from the side facing the rear window of the EL light emitter passes through the rear window and is distributed to the rear of the vehicle to function as a marker lamp.

  Specifically, since the back electrode layer of the organic EL light emitter is composed of a light reflection / transmission layer that reflects a part of incident light and transmits a part of the incident light, the side facing the rear window of the organic EL light emitter In addition to the light emitted directly from the front-side electrode layer, the light emitted from the organic light-emitting layer is reflected by the back-side electrode layer (light reflection / transmission layer) and emitted from the front-side electrode layer. The light to do is also included. That is, part of the light that should originally be emitted from the cabin side of the organic EL light emitter is emitted from the side facing the rear window. For this reason, the side facing the rear window of the organic EL light emitter emits bright light, and the visibility of the marker lamp is improved.

  On the other hand, only a part of the light emitted from the organic light emitting layer that has passed through the back electrode layer (light reflection / transmission layer) is emitted to the vehicle interior side of the organic EL light emitter.

  As a result, the light emitted from the vehicle interior side of the marker lamp is extremely weak light, and the light emitted from the vehicle interior to the vehicle interior side is guided to the driver through the rearview mirror to become glare light. Light emitted to the passenger compartment is distributed from the passenger compartment to the front of the vehicle, and does not act as misidentification information for oncoming vehicles or pedestrians.

  In addition, there is a marker lamp in the field of view behind the vehicle that can be seen through the rear window from the driver's seat, and the organic EL light emitter that constitutes the marker lamp has translucency, while the back electrode layer of the organic EL emitter. Since the (light reflection / transmission layer) transmits only a part of the incident light, the field of view behind the vehicle seen through the marker lamp is dark but not obstructed. This is the same whether the marker lamp is on or off.

In order to achieve the above object, in the vehicular marker lamp according to claim 5,
In a vehicle marker lamp, which is composed of a plate-shaped organic EL light emitter in which an organic light emitting layer is laminated between a pair of opposing electrode layers, and is disposed in a passenger compartment along a rear window of an automobile,
Each of the pair of electrode layers and the organic light emitting layer has translucency, and a light reflection / transmission layer that reflects a part of incident light and transmits a part thereof is formed on the side of the passenger compartment near the light emitter. A translucent member was provided.

In addition, as a structure of the organic EL light emitter, an organic EL light emitting element having a structure in which an organic light emitting layer is laminated between a pair of opposed electrodes is laminated and integrated on a transparent substrate constituting a light emitting surface, and an organic EL light emitting element is provided. Since the whole structure is generally covered with a translucent resin cover, the specific structure of the vehicle marker lamp according to claim 6 is such that light reflection / reflection on the translucent resin cover of the organic EL light emitter. A case where the transmissive layer is directly formed, and a case where a translucent member having a light reflection / transmission layer is disposed on the vehicle interior side of the translucent resin cover of the organic EL light emitter are considered.
(Operation) When the switch of the marker lamp is turned on and a DC voltage is applied between the electrode layers of the organic EL light emitter, the organic light emitting layer emits light in a predetermined color (for example, red for a stop lamp), and organic The red light emitted from the side facing the rear window of the EL light emitter passes through the rear window and is distributed to the rear of the vehicle to function as a marker lamp.

  Specifically, since a translucent member having a light reflection / transmission layer that reflects a part of incident light and transmits a part thereof is disposed on the side of the passenger compartment near the organic EL light emitter, the organic EL light emission The light emitted from the side facing the rear window of the body is directly emitted from the back electrode layer in addition to the light emitted from the front electrode layer among the light emitted from the organic light emitting layer. Light that is reflected by a nearby translucent member (its light reflection / transmission layer), enters and transmits the organic EL light emitter, and exits from the front electrode layer of the organic EL light emitter is also included. That is, a part of the light that should be emitted from the cabin side of the organic EL light emitter and should go to the front of the cabin is emitted from the side facing the rear window. For this reason, the side facing the rear window of the organic EL light emitter emits bright light, and the visibility of the marker lamp is improved.

  On the other hand, the light emitted from the cabin side of the organic EL light emitter enters the translucent member in the vicinity of the organic EL light emitter, but only a part of the light is transmitted through the light reflection / transmission layer and emitted. The part is reflected by the light reflecting / transmitting layer as described above.

  As a result, the light emitted from the vehicle interior side of the marker lamp is extremely weak light, and the light emitted from the vehicle interior to the vehicle interior side is guided to the driver through the rearview mirror to become glare light. Light emitted to the passenger compartment is distributed from the passenger compartment to the front of the vehicle, and does not act as misidentification information for oncoming vehicles or pedestrians.

  In addition, there is a marker lamp in the field of view behind the vehicle that can be seen through the rear window from the driver's seat, but the organic EL emitter that constitutes the marker lamp is translucent, but is disposed in the vicinity of the organic EL emitter. Since the light reflection / transmission layer of the translucent member transmits only a part of the incident light, the field of view behind the vehicle seen through the marker lamp is dark but not obstructed. This is the same whether the marker lamp is on or off.

  In addition, beacon lamps, stop lamps, turn signal lamps, clearance lamps and other marker lights are generally arranged at the rear of the vehicle body, but in order to ensure sufficient visibility behind the vehicle from the driver's seat, It is desirable to enlarge the rear window. However, when the rear window is enlarged, the space for placing the marker lamps in the rear part of the vehicle body is narrowed, and the degree of freedom for arranging the marker lamps is lost.

  However, in claims 1, 2, 3, 4 and 5, at least one of these indicator lights (for example, tail lamps and stop lamps) arranged at the rear of the vehicle body is arranged along the inside of the enlarged rear window. As a result, the number of marker lamps to be provided at the rear of the vehicle body is reduced, so that a sufficient space for installing the marker lamp at the rear of the vehicle body can be secured. Of course, the marker lamp disposed in the passenger compartment is transparent and does not block the rear view, so that the effect of increasing the size of the rear window can be enjoyed.

  As is clear from the above description, according to the vehicle sign lights according to claims 1, 2, 3, 4 and 5, when the lights are turned on / off, the rear view of the vehicle seen through the rear window is indicated by the sign lights. Since it is not obstructed, the visibility behind the vehicle from the driver's seat is improved.

  In particular, by enlarging the rear window, the visibility behind the vehicle from the driver's seat becomes better, and at least one of the indicator lights is arranged along the inside of the rear window. Since the number of marker lamps to be arranged at the rear is reduced, a sufficient marker lamp installation space is secured at the rear of the vehicle body, and the degree of freedom of marker lamp arrangement at the rear of the vehicle is greatly improved.

  In addition, according to the vehicle marker lamps according to claims 1 and 3, when the lamp is turned on, the lamp lamp emits light to the passenger compartment side so that it can be ignored, and the lamp lamp emits light through the rearview mirror. Even if it is led by a person, even if it does not become glare light, or even if it is distributed from the passenger compartment to the front of the vehicle, it gives misidentification information that makes the oncoming vehicle or pedestrian misrecognize the traveling direction of the vehicle Nor.

  According to the vehicular marker lamp of the second aspect, when the lamp is turned on, the polarized light emitted from the vehicle interior side of the organic EL light emitter is surely shielded by the polarizing plate. Therefore, the light emitted from the marker lamp does not act as glare light to the driver via the rearview mirror, or is distributed in front of the vehicle from the passenger compartment and does not act as misidentification information for oncoming vehicles or pedestrians.

  In addition, according to the vehicle sign lamps of claims 4 and 5, when the lamp is lit, light emitted from the sign lamp to the passenger compartment is extremely weak light, and the light emitted from the sign lamp is guided to the driver through the rearview mirror. Even if it is, glare light is not generated, and even if the light is distributed from the passenger compartment to the front of the vehicle, no misidentification information that causes the oncoming vehicle or pedestrian to erroneously recognize the traveling direction of the vehicle is provided.

  In addition, according to the vehicle marker lamps of the first, third, fourth, and fifth aspects, the light emitted from the side facing the rear window of the marker lamp originally includes a part of the light directed toward the passenger compartment side. Therefore, the visibility of the marker lamp is improved accordingly.

1 is a front view of a rear portion of an automobile in a first embodiment in which a vehicular marker lamp according to the present invention is applied to a stop lamp. FIG. It is a rear view (figure seen from the vehicle compartment side) of the stop lamp which is the 1st example of the present invention. It is a longitudinal cross-sectional view of the stop lamp. It is a longitudinal cross-sectional view of the stop lamp which is the 2nd Example of this invention. It is explanatory drawing explaining the structure of the stop lamp. The spectral distribution of the organic EL light emitter that is the main part of the stop lamp is shown, (a) shows the spectral distribution of polarized light in the vertical direction, and (b) shows the spectral distribution of polarized light in the horizontal direction. The transmittance distribution of the polarizing plate which is the main part of the stop lamp is shown, (a) shows the transmittance distribution of polarized light in the vertical direction, and (b) shows the transmittance distribution of polarized light in the horizontal direction. The transmittance distribution of the polarizing plate which is the main part of the stop lamp is shown, (a) shows the transmittance distribution of polarized light in the vertical direction, and (b) shows the transmittance distribution of polarized light in the horizontal direction. It is a longitudinal cross-sectional view of the stop lamp which is the 3rd Example of this invention. It is a longitudinal cross-sectional view of the stop lamp which is the 4th Example of this invention. It is a longitudinal cross-sectional view of the stop lamp which is the 5th Example of this invention. It is a longitudinal cross-sectional view of the stop lamp which is the 6th Example of this invention.

  Next, embodiments of the present invention will be described based on examples.

  1, 2 and 3 show a first embodiment in which the vehicular marker lamp according to the present invention is applied to a stop lamp.

  In these drawings, reference numeral 1 is a stop lamp formed in a thin plate shape having a substantially L-shape when viewed from the front, and is well-known on the inner side (vehicle compartment side) of a large area rear window 2 provided at the rear of the automobile. The fixing means is disposed so as to approach or closely contact the rear window 2.

  In FIG. 1, reference numeral 4 denotes a tail and stop lamp, reference numeral 6 denotes a turn signal lamp, reference numeral 8 denotes a backup lamp, and these lamps 4, 6 and 8 are all attached to the outside of the vehicle body.

  As shown in FIGS. 2 and 3, the stop lamp 1 is composed of a plate-shaped organic EL light emitter 10 including an organic EL display element 11 in which an organic light emitting layer 14 is laminated between a pair of opposed electrode layers 12a and 12b. Has been.

  Specifically, the organic EL display element 11 includes a transparent front electrode layer 12a such as an ITO film formed on the transparent substrate 13, a transparent organic light emitting layer 14 formed thereon, and further thereon. The back side electrode layer 12b having an opaque horizontal stripe pattern such as a metal film to be formed, and the horizontal stripe portions 12b1 constituting the back side electrode layer 12b are secured to each other (not shown), Insulation with the front electrode layer 12a is ensured. The organic EL light emitter 10 constituting the stop lamp 1 includes a transparent substrate 13 constituting the light emitting surface 10a, an organic EL display element 11 laminated and integrated on the transparent substrate 13, and a container-like covering the entire element 11. A transparent resin cover 15 is used.

  The electrode layers 12a and 12b are connected to the control unit 18a by connection lines 16a and 16b, and the control unit 18a is connected to a lamp switch 19 that is interlocked with the foot brake. The back electrode layer 12b having a stripe pattern is formed of a reflective layer that forms a metallic glossy surface at the boundary with the organic light emitting layer 14, and an organic layer is interposed between the horizontal stripe portions 12b1 and 12b1 arranged at equal intervals in the vertical direction. The surface 14a of the light emitting layer 14 is elongated in the left and right direction and is exposed in a band shape.

  When the switch 19 is turned on, a DC voltage is applied to the organic EL display element 11 via the control unit 18a so that the electrode layer 12a side becomes an anode, and holes are generated from the electrode layer 12a side. Electrons are respectively injected into the organic light emitting layer 14 from the electrode layer 12b side, and the organic light emitting layer 14 emits red light when holes and electrons are combined. That is, in the stop lamp 1, the light emitting surface 10a of the organic EL light emitter 10 emits red light in a stripe shape, passes through the rear window 2, and is distributed toward the rear of the vehicle (right direction in FIG. 3).

  Specifically, a portion of the organic light emitting layer 10 of the organic light emitting layer 14 corresponding to the striped back electrode layer 12b emits light and is emitted from the side facing the rear window 2 of the organic EL light emitting device 10. The incident light includes light reflected by a metallic glossy surface formed at the boundary between the back electrode layer 12b and the organic light emitting layer 14. In other words, the light originally emitted from the passenger compartment side is also reflected by the metallic gloss surface of the back-side electrode layer 12 b and emitted from the side facing the rear window 2. For this reason, the light emitting surface 10a facing the rear window 2 of the organic EL light emitter 10 emits light brightly in a stripe pattern, and the visibility of the stop lamp 1 is improved.

  On the other hand, on the vehicle interior side of the organic EL light-emitting body 10, the light emission of the organic light-emitting layer 14 is shielded by the striped back-side electrode layer 12b, and the back-side electrode layer 12b in the organic light-emitting layer 14 is not formed. (Strip-shaped region sandwiched between the horizontal stripe portions 12b1) 14a originally does not emit light, so that the organic light emitting layer 14 hardly emits light from the cabin side of the organic EL light emitter 10.

  As a result, the light emitted from the passenger compartment side of the stop lamp 1 is extremely weak light that can be ignored, and the light emitted from the stop lamp 1 to the passenger compartment side is guided to the driver via the rearview mirror and becomes glare light. Moreover, the light emitted from the stop lamp 1 toward the passenger compartment is distributed from the passenger compartment to the front of the vehicle, and does not act as misidentification information for oncoming vehicles or pedestrians.

  Further, the stop lamp 1 exists in the field of view behind the vehicle seen through the rear window 2 from the driver's seat, but the back side electrode layer (striped pattern) 12b of the organic EL light emitter 10 constituting the stop lamp 1 is formed. Since the unoccupied area can be seen through transparently, the field of view behind the vehicle seen through the stop lamp 1 is dark but not blocked. This is the same whether the stop lamp 1 is turned on or off.

  In the above-described embodiment, the stripe pattern of the back-side electrode layer 12b is formed as horizontal stripes, but the stripe pattern is not limited to horizontal stripes, and may be vertical stripes or diagonal stripes.

  FIG. 4 is a longitudinal sectional view of a stop lamp according to a second embodiment of the present invention.

  The stop lamp 1A according to the second embodiment includes a plate-shaped organic EL light emitter 10A and a horizontal polarizing plate 20 disposed in the vicinity of the passenger compartment side of the light emitter 10A.

  The organic EL light emitter 10A has the same basic configuration as the organic EL light emitter 10 constituting the stop lamp 1 of the first embodiment described above, but differs in the following points.

  That is, the organic light emitting layer 14A (the organic light emitting layer 14A constituting the organic EL display element 11A) of the organic EL light emitting body 10A is aligned in the vertical direction by regularly aligning the molecular chains constituting the organic light emitting layer in one direction. The back-side electrode layer 12c is formed of a transparent conductive film such as an ITO film laminated on the organic light-emitting layer 14A, similarly to the front-side electrode layer 12a, while being configured as an organic polarized light-emitting layer that emits polarized light. .

  Therefore, when the switch of the stop lamp 1A is turned on and a DC voltage is applied between the electrode layers 12a and 12b of the organic EL light emitter 10A, the entire organic polarized light emitting layer 14A emits red light (a straight line in the vertical direction). Red polarized light emitted from the side facing the rear window 2 of the organic EL light emitter 10A passes through the rear window 2 and is distributed to the rear of the vehicle, and functions as a stop lamp 1A (FIG. 4). , 5).

  6A and 6B show the spectral distribution characteristics of the organic EL light emitter 10A (organic EL display element 11A). As shown in this figure, the light emission of the organic EL light emitter 10A is around a wavelength of 620 nm. Only red light (vertical polarized light) is included, and horizontal polarized light is not included at all (see FIG. 6B).

  The horizontal polarizing plate 20 shields the vertically polarized light but transmits the horizontally polarized light, and emits polarized light (vertically polarized light) toward the cabin side of the organic EL light emitter 10A. ) Is surely shielded from light (see FIG. 5).

  7A and 7B show the transmittance distribution of the horizontal polarizing plate 20, FIG. 7A shows the transmittance distribution of polarized light in the vertical direction, and FIG. 7B shows the transmittance of polarized light in the horizontal direction. As shown in this figure, the polarizing plate 20 shields 100% of the polarized light in the vertical direction and transmits 100% of the polarized light in the horizontal direction.

  Other configurations are the same as those of the stop lamp 1 according to the first embodiment described above, and the same reference numerals are given to omit redundant description.

  As described above, the polarized light emission on the passenger compartment side of the organic EL light emitter 10A is reliably shielded by the horizontal polarizing plate 20, so that the light emission of the stop lamp 1A may be guided to the driver via the rearview mirror. There is no light distribution from the passenger compartment to the front of the vehicle.

  Further, as shown in FIG. 5, the stop lamp 1A is present in the field of view behind the vehicle which can be seen through the rear window 2 from the driver's seat, and the organic EL light emitter 10A itself is transparent and seen through (polarized light in the vertical direction). However, the horizontal polarizing plate 20 can only transmit horizontal polarized light (cannot transmit vertical polarized light). For this reason, the field of view behind the vehicle seen through the stop lamp 1A is darkened by the low visible light transmittance of the polarizing plate 20, but is not blocked by the stop lamp 1A. This is the same whether the stop lamp 1A is on or off.

  In the second embodiment described above, the transmittance distribution of the horizontal polarizing plate 20 is such that the polarized light in the vertical direction is blocked by 100% as shown in FIG. Although the light transmittance is low and the field of view behind the vehicle seen through the stop lamp 1A is inevitably dark, instead of the polarizing plate 20, as shown in FIGS. 8 (a) and 8 (b), the vertical direction When using a horizontal polarizing plate that has a transmittance distribution that blocks only the red wavelength region (around 620 nm) of the polarized light and transmits 100% of the polarized light in the horizontal direction, visible light transmission through the horizontal polarizing plate Since the rate is significantly increased, the field of view behind the vehicle seen through the stop lamp 1A is bright and easy to see.

  In the second embodiment described above, the organic light emitting layer 14A is composed of an organic polarized light emitting layer that emits red light in the vertical direction, and the polarizing plate 20 disposed on the side of the passenger compartment near the light emitter 10A is in the horizontal direction. Although composed of a polarizing plate, the organic light emitting layer 14A is composed of an organic polarized light emitting layer that emits light polarized in red in the horizontal direction, and the polarizing plate 20 disposed on the passenger compartment side near the light emitter 10A is a vertical direction polarizing plate. (A polarizing plate that shields polarized light in the horizontal direction and transmits polarized light in the vertical direction).

  FIG. 9 is a sectional view of a stop lamp according to a third embodiment of the present invention.

  In the stop lamp 1B according to the third embodiment, the back-side electrode layer 12b of the organic EL light emitter 10B (the back-side electrode layer 12b of the organic EL display element 11B integrated with the transparent substrate 13) is the first one. In the same manner as the back-side electrode layer 12b of the organic EL light emitter 10 constituting the stop lamp 1 according to the embodiment, a reflective layer (stripe portion) 12b1 having a horizontal stripe pattern that forms a metallic gloss surface at the boundary with the organic light emitting layer 14A. It is configured.

  Other configurations are the same as those of the stop lamp 1A according to the second embodiment described above, and the same reference numerals are given to omit redundant description.

  In the stop lamp 1B, similarly to the stop lamp 1A, the organic light emitting layer 14A is composed of a transparent organic polarized light emitting layer that emits light polarized in the vertical direction. Therefore, when a DC voltage is applied between the electrode layers 12a and 12b, The organic polarized light emitting layer 14A of the organic EL light emitter 10B emits polarized light in the vertical direction.

  Further, the back-side electrode layer 12b is composed of a stripe-patterned reflective layer (stripe portion) 12b1 as in the stop lamp 1 of the first embodiment, so that the stripe-patterned back-side electrode in the organic polarized light-emitting layer 14A. Only the portion corresponding to the layer 12b emits polarized light (the rear electrode layer non-forming region does not emit light), the light emitting surface 10a of the organic EL light emitter 10B emits light in a stripe shape (polarized light emission), and passes through the rear window 2. The light is distributed to the rear of the vehicle and functions as the stop lamp 1B.

  Further, of the light emitted from the organic polarized light-emitting layer 14A, the light originally emitted from the passenger compartment side is also reflected by the metallic gloss surface of the back-side electrode layer 12b and emitted from the light-emitting surface 10a of the organic EL light emitter. The light distribution at the rear of the lamp 1B increases, and the visibility is improved.

  On the other hand, on the vehicle interior side of the organic EL light emitter 10B, the polarized light emission of the organic polarized light emitting layer 14A is shielded by the striped back electrode layer 12b, and the back electrode layer non-formation region in the organic polarized light emitting layer 14A is Since no light is emitted originally, the polarized light emitted from the organic polarized light emitting layer 14A can hardly be emitted from the cabin side of the organic EL light emitter 10B.

  Further, for example, the polarized light emission of the organic polarized light emitting layer 14A leaked to the vehicle interior side of the organic EL light emitting body 10B from the gap between the horizontal stripe portions 12b1 and 12b1 extending at equal intervals in the vertical direction of the back electrode layer 12b. However, since the light is reliably shielded by the horizontal polarizing plate 20, the light emitted from the stop lamp 1B is not guided to the driver via the rearview mirror, and is not distributed from the vehicle interior to the front of the vehicle.

  Further, the stop lamp 1B exists in the field of view behind the vehicle seen through the rear window 2 from the driver's seat, and the back electrode layer (stripe pattern) 12b non-formation region of the organic EL light emitter 10B constituting the stop lamp 1B is formed. Although it can be seen through transparently, since the visible light transmittance of the polarizing plate 20 is low, the field of view behind the vehicle seen through the stop lamp 1B is darker than the second stop lamp 1A, but the stop It is not blocked by the lamp 1B. This is the same whether the stop lamp 1B is on or off.

  In the stop lamp 1B of the third embodiment described above, the horizontal polarizing plate 20 is provided in the vicinity of the cabin side of the organic EL light emitter 10B. However, the horizontal polarizing plate 20 is not necessarily provided.

That is, light emitted from the stop lamp 1B on the passenger compartment side is extremely weakly polarized light leaking from the striped back electrode layer 12b, and the light emitted to the passenger compartment side of the stop lamp 1B is transmitted to the rear mirror. The glare light is guided to the driver through the vehicle, and the light emitted from the stop lamp 1B toward the vehicle compartment is distributed from the vehicle interior to the front of the vehicle to act as misidentification information for oncoming vehicles and pedestrians. Nor.

  In the structure in which the horizontal polarizing plate 20 is not provided, the field of view behind the vehicle seen through the stop lamp 1B becomes brighter because there is no polarizing plate 20 having a low visible light transmittance, and the rear window 2 from the driver seat becomes brighter. Visibility behind the vehicle seen through can be improved.

  FIG. 10 is a longitudinal sectional view of a stop lamp that is a fourth embodiment of the present invention.

  The organic EL light emitter 10C constituting the stop lamp 1C according to the fourth embodiment includes a transparent substrate 13 constituting the light emitting surface 10a, an organic EL display element 11C laminated and integrated on the transparent substrate 13, and an element 11C. It is comprised with the container-shaped transparent resin cover 15 which covers the whole.

  The organic EL display element 11C is formed on a transparent front side electrode layer 12a such as an ITO film formed on the transparent substrate 13, a transparent organic light emitting layer 14 formed thereon, and further thereon. The back side electrode layer 12d is constituted by a half mirror 30 formed by depositing, for example, an aluminum thin film by vapor deposition or the like. The half mirror 30 constituting the back side electrode layer 12d has a characteristic of reflecting a part of incident light and transmitting a part thereof, and its light transmittance (light reflectance) is adjusted by changing the film thickness. it can.

  Further, the organic EL light emitter 10C constituting the stop lamp 1C is formed in a plate shape following the rear window 2A made of a translucent resin, and the rear window 2A is made of elastic adhesive or elastic double-sided tape 40. It is fixed inside (vehicle compartment side). Specifically, the entire area of the light emitting surface 10a of the stop lamp 1C is sealed with an elastic adhesive or an elastic double-sided tape 40 interposed between the peripheral edge of the transparent substrate 13 of the organic EL light emitting body 10C and the rear window 2A.

  For this reason, since the light emitting surface 10a of the stop lamp 1C is less likely to be contaminated by dust or the like, the visibility of the stop lamp 1C is ensured for a long period of time, and the view behind the vehicle seen through the stop lamp 1C can be improved. Visibility is also guaranteed for a long time.

  Further, vibrations transmitted from the rear window 2A to the organic EL light emitter 10C constituting the stop lamp 1C and thermal stress generated between the rear window 2A and the transparent substrate 13 are caused by elastic adhesive or elastic double-sided tape 40. Therefore, the durability of the stop lamp 1C (organic EL light emitter 10C) is ensured as much as the load transmitted to the organic EL light emitter 10C is reduced.

  Other configurations are the same as those of the stop lamp 1A according to the first embodiment described above, and the same reference numerals are given to omit redundant description.

  Next, the visibility of the stop lamp 1C as a marker lamp and the visibility behind the vehicle from the driver through the stop lamp 1C will be described.

  When the switch of the stop lamp 1C is turned on and a DC voltage is applied between the electrode layers 12a and 12d of the organic EL light emitter 10C, the organic light emitting layer 14 emits red light, and the light emitting surface 10a ( The red light emitted from the organic EL light emitter 10C facing the rear window 2A) is transmitted through the rear window 2A and distributed to the rear of the vehicle (right side in FIG. 10), and functions as the stop lamp 1C.

  Specifically, since the back-side electrode layer 12d of the organic EL light emitter 10C is composed of the half mirror 30, the organic light emitting layer 14 is included in the light emitted from the light emitting surface 10a of the stop lamp 1C (organic EL light emitter 10C). In addition to the light emitted directly from the front-side electrode layer 12a, the light emitted from the front-side electrode layer 12a after being reflected by the back-side electrode layer 12d (half mirror 30) is also included.

  That is, part of the light that should originally be emitted from the passenger compartment side of the stop lamp 1C (organic EL light emitter 10C) is also emitted from the light emitting surface 10a of the stop lamp 1C, so that the light emitting surface 10a of the stop lamp 1C is even brighter. Light is emitted and the visibility of the stop lamp 1C is improved.

  On the other hand, only part of the light emitted from the organic light-emitting layer 14 that has passed through the back-side electrode layer 12d (half mirror 30) is emitted to the passenger compartment side of the stop lamp 1C (organic EL light emitter 10C).

  As a result, the emission of the stop lamp 1C on the passenger compartment side is extremely weak light, and the emission of the stop lamp 1C to the passenger compartment side is guided to the driver via the rearview mirror to become glare light. The light emitted from the lamp 1C toward the passenger compartment is distributed from the passenger compartment to the front of the vehicle and does not act as misidentification information for oncoming vehicles or pedestrians.

  The stop lamp 1C is present in the field of view behind the vehicle seen through the rear window 2A from the driver's seat. The organic EL light emitter 10C constituting the stop lamp 1C is translucent, while the organic EL light emitter 10C. Since the rear side electrode layer 12d (half mirror 30) transmits only a part of the incident light, the field of view behind the vehicle seen through the stop lamp 1C is dark but not blocked. This is the same whether the stop lamp 1C is turned on or off.

  In particular, during the daytime, since the bright exterior of the vehicle can be seen from the dark interior through the stop lamp 1C, the rear of the vehicle can be sufficiently visually recognized.

  FIG. 11 is a cross-sectional view of a stop lamp that is a fifth embodiment of the present invention.

  The organic EL light emitter 10D constituting the stop lamp 1D according to the fifth embodiment includes a transparent substrate 13 constituting the light emitting surface 10a, an organic EL display element 11D laminated and integrated on the transparent substrate 13, and an element 11D. The container-shaped transparent resin cover 15 that covers the whole is formed, and a half mirror 30 is formed on the transparent resin cover 15.

  Specifically, the organic EL display element 11D includes a transparent front side electrode layer 12a such as an ITO film formed on the transparent substrate 13, a transparent organic light emitting layer 14 formed thereon, and further thereon. It is composed of a transparent back electrode layer 12e such as an ITO film to be formed.

  A half mirror 30 that reflects part of incident light and transmits part of the incident light is formed inside the transparent resin cover 15, and part of light emitted from the organic EL display element 11 </ b> D is reflected by the half mirror 30. , A part of the light passes through the half mirror 30 and further passes through the transparent resin cover 15.

  Other configurations are the same as those of the stop lamp 1A according to the first embodiment described above, and the same reference numerals are given to omit redundant description.

  Next, the visibility of the stop lamp 1D as a marker lamp and the visibility behind the vehicle from the driver through the stop lamp 1D will be described.

  When the switch of the stop lamp 1D is turned on and a DC voltage is applied between the electrode layers 12a and 12e of the organic EL light emitter 10D, the organic light emitting layer 14 changes to a predetermined color (for example, red in the stop lamp). Red light emitted from the light emitting surface 10a of the stop lamp 1D (the side facing the rear window 2A) is transmitted through the rear window 2A and distributed to the rear of the vehicle to function as the stop lamp 1D.

  Specifically, since the half mirror 30 is formed inside the transparent resin cover 15 that covers the organic EL display element 11D (the back-side electrode layer 12e), from the light emitting surface 10a of the stop lamp 1D (organic EL light emitter 10D). Of the light emitted from the organic light emitting layer 14, the emitted light is directly emitted from the back electrode layer 12 e in addition to the light emitted from the front electrode layer 12 a, but is reflected by the half mirror 30 of the transparent resin cover 15. In addition, light that enters and transmits through the organic EL display element 11D and exits from the front electrode layer 12a is also included.

  That is, a part of the light that should be emitted from the vehicle interior side of the stop lamp 1D (organic EL light emitter 10D) and should be directed forward of the vehicle interior is also emitted from the light emitting surface 10a of the stop lamp 1D. For this reason, the light emission surface 10a of the stop lamp 1D emits light brightly, and the visibility of the stop lamp 1D is improved.

  On the other hand, on the side of the passenger compartment of the stop lamp 1D (organic EL light emitter 10D), a part of the light emitted from the organic light emitting layer 14 emitted from the back electrode layer 12e is transmitted through the half mirror 30 of the transparent resin cover 15. Only light is emitted.

  As a result, the emission of the stop lamp 1D on the passenger compartment side is extremely weak light, and the emission of the stop lamp 1D to the passenger compartment side is guided to the driver via the rearview mirror to become glare light. The light emitted from the lamp 1D toward the passenger compartment is distributed from the passenger compartment to the front of the vehicle, and does not act as misidentification information for oncoming vehicles or pedestrians.

  The stop lamp 1D is present in the field of view behind the vehicle seen through the rear window 2A from the driver's seat. The organic EL light emitter 10D constituting the stop lamp 1D is translucent, while the transparent resin cover 15 Since the half mirror 30 transmits only a part of the incident light, the field of view behind the vehicle which can be seen through the stop lamp 1D is dark but not blocked. This is the same whether the stop lamp 1D is on or off.

  In particular, during the daytime, since the bright exterior of the vehicle can be seen from the dark interior through the stop lamp 1C, the rear of the vehicle can be sufficiently visually recognized.

  In the fifth embodiment, the half mirror 30 is formed on the transparent resin cover 15 constituting the organic EL light emitter 10D. Instead of forming the half mirror 30 on the transparent resin cover 15, FIG. As shown in FIG. 3, the half mirror 30 may be formed on the translucent resin plate 32 disposed on the side of the passenger compartment near the plate-shaped organic EL light emitter 10E.

  That is, the stop lamp 1E according to the sixth embodiment includes a transparent substrate 13 constituting the light emitting surface 10a, an organic EL display element 11D laminated and integrated on the transparent substrate 13, and a container-like transparent covering the entire element 11D. The organic EL light emitter 10E is composed of a resin cover 15 and a translucent resin plate 32 on which a half mirror 30 is formed.

  Since the other configuration is the same as that of the stop lamp 1D of the fifth embodiment, the same reference numerals are given and the redundant description is omitted.

1, 1A, 1B, 1C, 1D, 1E Stop lamp as a mark light 2, 2A Rear window 10, 10A, 10B, 10C, 10D of an automobile Organic EL light emitter 10a Light emitting surface 11, 11A, 11B, 11C, 11D Organic EL display elements 12a, 12b, 12c, 12d, 12e Electrode layer 12b1 Horizontal stripe portion 13 Transparent substrate 14, 14A Organic light emitting layer 20 Horizontally polarizing plate 30 Half mirror 32 Translucent resin plate

Claims (5)

In a vehicle marker lamp, which is composed of a plate-shaped organic EL light emitter in which an organic light emitting layer is laminated between a pair of opposing electrode layers, and is disposed in a passenger compartment along a rear window of an automobile,
The organic light emitting layer and the front electrode layer of the light emitter are each configured to be transparent, and the back electrode layer of the light emitter is a stripe-patterned reflective layer that forms a metallic glossy surface at the boundary with the organic light emitting layer. A vehicular marker lamp characterized by comprising. In a vehicular marker lamp, which is composed of a plate-shaped organic EL light emitting body in which an organic light emitting layer is laminated between a pair of opposing electrode layers, and is disposed in a vehicle compartment along a rear window of an automobile,
The front side electrode layer and the back side electrode layer of the light emitter are each configured to be transparent, and the organic light emitting layer is configured with a transparent organic polarized light emitting layer that emits linearly polarized light vertically or horizontally,
A sign lamp for a vehicle, wherein a polarizing plate for shielding polarized light emitted from the light emitter toward the vehicle interior is disposed on the vehicle interior side in the vicinity of the light emitter.   2. The vehicular marker lamp according to claim 1, wherein the organic light emitting layer comprises a transparent organic polarized light emitting layer that emits linearly polarized light vertically or horizontally. In a vehicle marker lamp, which is composed of a plate-shaped organic EL light emitter in which an organic light emitting layer is laminated between a pair of opposing electrode layers, and is disposed in a passenger compartment along a rear window of an automobile,
The pair of electrode layers and the organic light emitting layer each have translucency, and the back electrode layer is composed of a light reflection / transmission layer that reflects part of incident light and transmits part of the incident light. Characteristic vehicle lamp. In a vehicle marker lamp, which is composed of a plate-shaped organic EL light emitter in which an organic light emitting layer is laminated between a pair of opposing electrode layers, and is disposed in a passenger compartment along a rear window of an automobile,
Each of the pair of electrode layers and the organic light emitting layer has translucency, and a light reflection / transmission layer that reflects a part of incident light and transmits a part thereof is formed on the side of the passenger compartment near the light emitter. A sign lamp for a vehicle, wherein a translucent member is provided.

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